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61,005 resultsShowing papers similar to Study the impact of microplastic pollutants on marine algae by novel dielectric spectroscopy method
ClearMeasuring the effects of diethyl phthalate microplastics on marine algae growth using dielectric spectroscopy
Researchers developed a dielectric spectroscopy-based sensing method using a custom transmission-line probe on a printed circuit board to monitor the effects of diethyl phthalate (DEP) microplastics on the growth of marine algae (Chlorella pyrenoidosa). Exposure to increasing DEP concentrations over 6 days progressively suppressed algal growth rates and chlorophyll content, with the reflection coefficient at 740 MHz providing a linear indicator of growth inhibition.
Electrical impedance spectroscopy based strategy for detecting and differentiating microplastics in water
Researchers developed a submersible electrical impedance spectroscopy approach capable of detecting and differentiating microplastics directly in biologically active aquatic environments, overcoming the labor-intensive preprocessing requirements of conventional FTIR and Raman methods.
Measuring Microplastic Concentrations in Water by Electrical Impedance Spectroscopy
Researchers developed a method using electrical impedance spectroscopy to measure microplastic concentrations in water samples without requiring complex laboratory equipment. The technique can distinguish between different concentrations and types of plastic particles based on their electrical properties. The study offers a potentially faster and more accessible approach for routine microplastic monitoring in water treatment and environmental settings.
Interplay of plastic pollution with algae and plants: hidden danger or a blessing?
Researchers tested the ability of three microalgae species to remove microplastics from water through bioadhesion, finding that all three species could adsorb particles onto their surfaces. Removal efficiency depended on particle size, surface charge, and algae cell morphology.
In Situ Determination of Chlorella Concentration Using Single Entity Electrochemistry
Researchers developed an electrochemical method for detecting individual algal cells in real time using an ultramicroelectrode and single-particle collision technique. The approach could distinguish individual Chlorella cells and relate collision frequency to algal concentration, offering potential for early detection of harmful algal blooms. While not directly focused on microplastics, the method provides a platform for monitoring water quality impacts related to microplastic-linked eutrophication.
Evaluating physiological responses of microalgae towards environmentally coexisting microplastics: A meta-analysis
A meta-analysis of 52 studies found that microplastics inhibit microalgal growth and photosynthesis and induce oxidative damage, though microalgae can recover over time. Cyanobacteria are more vulnerable than green algae, and the relative size of microplastics to algal cells governs the mechanism of impact, while aged versus pristine microplastics have opposite effects on extracellular polymeric substance and microcystin production.
Quantification of Very Low Concentrations of Colloids with Light Scattering Applied to Micro(Nano)Plastics in Seawater
Researchers evaluated static and dynamic light scattering techniques for detecting and quantifying colloidal microplastic and nanoplastic particles (0.1-0.8 micron diameter) at very low concentrations in marine water, demonstrating their potential as rapid, non-destructive monitoring tools.
A microwave-based technique as a feasible method to detect plastic pollutants in experimental samples
Researchers developed a non-destructive microwave-based cavity perturbation technique at 2-4 GHz to identify plastic pollutants including polypropylene, LDPE, HDPE, and cross-linked polyethylene, demonstrating that dielectric constant and loss tangent measurements can distinguish polymer types without destroying samples.
Discrimination of Microplastics and Phytoplankton Using Impedance Cytometry
Researchers demonstrated that impedance cytometry can discriminate between microplastics and phytoplankton in ocean water samples. The study suggests this technique could enable high-throughput, deployable monitoring of both plankton communities and microplastic pollution levels, addressing a key gap in current marine monitoring capabilities.
Effect and mechanism of microplastics exposure against microalgae: Photosynthesis and oxidative stress
Meta-analysis of 55 studies (835 endpoints) found that microplastics reduce chlorophyll-a content and hinder electron transfer in microalgae photosynthetic systems, causing oxidative stress damage. Effects were concentration- and size-dependent, with freshwater microalgae more susceptible than marine species.
Behavior and surface properties of microalgae indicate environmental changes
Not relevant to microplastics — this microcosm study examines how temperature and salinity stress affect the behavior, growth, and surface properties of three marine microalgal species.
Effect of microplastics exposure on the photosynthesis system of freshwater algae
Researchers investigated how polypropylene and polyvinyl chloride microplastics affect the photosynthesis system of freshwater algae and found that both types reduced chlorophyll content and impaired photosynthetic efficiency. The damage was concentration-dependent and worsened over the growth period. The study highlights that microplastic pollution in freshwater can harm algae, which form the base of aquatic food chains.
Microplastics impacts in seven flagellate microalgae: Role of size and cell wall
Seven marine flagellate microalgae species were incubated with 1-micrometer polystyrene microplastics at 10 mg/L, revealing that cell size and the presence of a cell wall strongly influenced the degree of microplastic-induced physiological and growth effects across species.
Identification of microplastics in the aquatic environment, or in the presence of algae Chlorella sp., by comparison of biophotonic methods
Researchers compared multiple light-based (biophotonic) methods — including FTIR, Raman spectroscopy, and fluorescence microscopy — for identifying microplastics in water samples containing algae, which can make detection much harder. They found that combining multiple methods improves accuracy and allows for real-world monitoring of microplastics in complex aquatic environments where other organic material is present.
Concentration dependent toxicity of microplastics to marine microalgae
A dose-response study of microplastic effects on marine microalgae found concentration-dependent toxicity across multiple species, with higher MP concentrations reducing growth rates, photosynthesis efficiency, and chlorophyll content, confirming that microplastics pose risks to the base of marine food webs.
Do plastic particles affect microalgal photosynthesis and growth?
This study investigated whether polystyrene particles of different sizes and charges affect growth and photosynthesis in three marine microalgae species. The results showed that charged particles caused greater inhibition of algal growth at the lowest concentrations tested, suggesting that plastic particle charge and size influence their toxicity to primary producers at the base of marine food chains.
Comparative assessment of MP effects on pigment composition and lipid profiles in three marine microalgae
Researchers exposed three marine microalgae species to polyethylene and polypropylene microplastics and found that the particles altered pigment composition and lipid profiles in species-specific ways. Microplastic exposure generally reduced photosynthetic pigments and shifted fatty acid profiles, with effects varying depending on the polymer type and concentration ratio. The study suggests that microplastic pollution could disrupt the biochemistry of ecologically and commercially important microalgae at the base of marine food webs.
Spectroscopies infrarouge et Raman de microalgues : étude des interactions avec des micro et nanoparticules
Researchers used Raman and infrared spectroscopy to study how freshwater microalgae interact with micro- and nanoparticles including plastics, without requiring extensive sample preparation. These rapid vibrational spectroscopy techniques can detect early cellular effects of particle exposure in organisms at the base of the food chain.
Protocol for low-cost quantification of microplastics through electrochemical impedance spectroscopy from aqueous matrices
Most methods for detecting microplastics in water require expensive equipment or time-consuming laboratory steps. This study presents a simple protocol using electrochemical impedance spectroscopy (EIS) — measuring how microplastics change the electrical resistance of a solution — to rapidly and cheaply quantify plastic particles in water samples. Validated against conventional optical methods, the approach could make routine microplastic monitoring more affordable and accessible, particularly for lower-resource settings or high-throughput screening applications.
Toxic Effects of Microplastics on Culture Scenedesmus quadricauda: Interactions between Microplastics and Algae
Researchers found that microplastics from multiple polymer types inhibit growth of the freshwater alga Scenedesmus quadricauda and induce oxidative stress, with toxicity varying by polymer type, particle size, and concentration.
The effect of microplastics pollution in microalgal biomass production: A biochemical study
Scientists exposed the marine microalga Phaeodactylum tricornutum to polystyrene microplastics and found that both short- and long-term exposure at environmentally relevant concentrations disrupted biochemical composition including proteins, carbohydrates, and lipids.
Concentration dependent toxicity of microplastics to marine microalgae
Researchers exposed the marine microalga Chlorella sp. to polystyrene microplastics at concentrations of 10 and 50 mg/L, finding that even low concentrations inhibited growth and disrupted photosynthesis, while higher concentrations caused more pronounced oxidative stress.
Microplastics – A major contaminant in marine macro algal population: Review
This review identified the occurrence and characteristics of microplastics in marine macroalgae, highlighting macroalgae as both indicators of MP pollution and potential entry points for microplastics into marine food webs.
A multi-factor analysis evaluating the toxicity of microplastics on algal growth
This meta-analysis evaluated how microplastic characteristics such as polymer type, size, shape, and concentration influence algal growth, finding that effects range from inhibition to enhancement depending on multiple interacting factors.